Magneto-electric generator.



No. 660,820. Patented 001. 30, I900.

. c; H. NORTH.

IAGNETU ELECTRIC GENERATOR.

(Application fllod Aug. 24, 1900.)

2 Shaeta-Sha0t l.

' (N0 Ilodel.)

Even Col? W ufnessea No. 660,820. Patented Oct. 30, I900. 0. H. NORTH.

MAGNETU ELECTRIC GENERATOR.

(Application filed Aug. 24, 1900.)

(No Model.) 2 Sheets-Sheet 2.

7f fnesed iver-af CC: ,jwlT :H \{GENERATOR FRAME $3M WWWWWAM @fiGENERATOR ARMATURE UNITE STATES PATENT OFFICE.

CHARLES II. NORTH, OF CLEVELAND, OHIO, ASSIGNOR TO THE NORTH ELECTRICCOMPANY, OF SAME PLACE.

MAGNETO-ELECTRIC GENERATOR.

SPECIFICATION forming part of Letters Patent No. 660,820, dated October30, 1900.

Application filed August 24, 1900. Serial No. 27,881. \No model.)

10 all whom it may concern:

Be it known that I, CHARLES H. N ORTH, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Magneto-ElectricGenerators, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings.

My invention relates to magneto-electric generators and the circuitconnections thereof; and my object is to primarily provide such aninstrument with improved automatic means for opening a shunt-circuitnormally around the armature-coils when said generator is operated.

The invention consists in the mechanical means I employ to effect thisend; and it further consists in the construction and combination ofparts more fully described hereinafter and definitely set forth in theclaims.

In the drawings which fully illustrate my invention, Figure 1 is a sideelevation of a magneto-electric generator to which my invention has beenapplied, one end thereof being broken away to disclose the interior.Fig. 2 is a longitudinal vertical section of the same, part of theinterior being shown in section and part in full. Fig. 3 is a rearelevation, and Fig. 4 a vertical cross-section looking toward thedriving end of the instrument. Fig. 5 is a longitudinal central sectionof the driving-shaft; and Fig. 6 is a partial longitudinal section in aplane at right angles to the plane of Fig. 5, being taken on the line 66 of Fig. 5. Fig. 7is a diagram illustrating the circuit connections.

For the better illustration of my invention 1 will describe now brieflythe construction of the machine to which I have shown it as applied.

Referring to Figs. 1 to 4, M represents a battery of permanenthorseshoemagnets, the like poles of which are joined by commonpolepieces P, which pole-pieces are bent to partially confine asubstantially cylindrical armature-space and are held by the outsidecontiguous frame-bolts 1). End plates B B are seen red upright againstthe ends of the polepieces P by these bolts 10, which pass through themfor that purpose. These end plates B B support the armature-shaft S anddrivingshaft V. The magnets are secured in place by screws C, passingthrough binding-washers and between the individual magnets into thepole-pieces P. The armature-shaft.carries a pinion s, the driving-shaftcarrying a gear 1;, meshing therewith, and a crank H, whereby thearmature is rotated.

In applying myinvention to such a machine as above described I employ aspart of the circuit connection a resilient switch member R, which iscarried upon an insulating-block T, fastened upon the end plate B. Thisinsulating-block T is preferably made annular and connected to the plateby screws t, as shown. The member R has a projection 1', which contactsthe end of a pin 3, which pin is set into but insulated from thearmatureshaft S and forms a terminal for the armature-coil 5 the otherterminal of said coil being in the armature-shaft. This member extendsat one end across the end of the driving-shaft V, its resiliencepressing it toward the shaft, and it is provided nearits base with a lugr whereby it may be connected to form a terminal of the main circuit,the other terminal being connected with the frame at any desired point.

The shaft V and its connections are best shown in Figs. 5 and 6. It is'a compound member, including the solid shaft 1) and the inclosing tube42 between which there may be limited movement. The tube is journaled insuitable bushings D, carried by the end plates B B, and locked by acollar E with a setscrew e. The switch member-R normally contacts theend of the tube, whereby the shunt is established via this switchmember, tube,and frame around the arm attire-winding. Just Within theouter end of the tube it carries loosely a plug 0 of insulatingmaterial, behind which is a sliding bolt This sliding bolt v carries apin 2;, whose ends project into longitudinal slots W. This constructionpermits only longitudinal movement of the bolt with respect to the tubeo The shaft o fills the rest of the tube '0 Its inner end has a V notcho into which fits a cooperating V- point on the end of the bolt v andthe tube has a short circumferential slot '0 in which rides the head ofthe screw o which sets into the shaft if. This cmistruction permits onlylimited rotation of the shaft with respecl to the tube n. The angle ofthe notch is sufficiently wide so that a rotation of the shaft 1; withrespect to the tube n will operate to cause the notch 2; to ride up intoa less intimat-e contact with the bolt, shoving itand insulatii'ig-plug0 toward the outer end of the tube, which breaks the contact between theswitch member R and the tube, opening the shunt.

A spring normally holds the shaft v in position so that the notch it"may he in the most intimate contact therewith, and the resilience of theswitch member R forces the bolt into such location. The connectionswhich effect. this are the following: The tube 0" carries a hub rigidtherewith, on itsinner end. This hub has a boss over which takes thegear wheel 0, which is rigidly secured thereto. This gear is simply aplate whose edge is flanged outwardly to have teeth out therein. Thedisk portion of this gear has a number of large holes r punched throughit. One end of a spring 12 which is preferably a helical spring of fewturns, is carried by the gearwheel 2*,preferably as shown,by hookingoveran integral projection c The other end is similarly fastened to theplate or retainer n. This retainer "0 is rigidly connected with theshaft c, preferablyseating around a squared boss o thereon, with a nut csecuring it in place. Its edge is flanged inwardly toward the gear 1?,and at intervals at number of tongues v which are integral with saidedge, project into the circular holes r referred to, there being acorresponding number of tongues and holes.

A crank H is suitably mounted on the shaft c, and the turning of thiscrank operates immediately to rotate the retainer 0 overcoming thespring 1112, which normally holds the retainer in constraint, so thatits teeth are in contact with an edge of the holes ii, for the force ofthe magnets retards the armature, and hence the gear 1;, and theretainer 21 thus moves independently of the gear '0' until said tonguesstrike the opposite sides of the holes i2 when the gear is driventhereby. This limited movement of the shaft c with respect to the tube nwill have moved the bolt '0 in the manner described above, the plug cforcing the switch member R away from the tube 12 breaking the shunt,and the shunt will remain open throughout the continued rotation.

It will be noticed that the tube 0 may be journaled in the bushings Dwith sufficient snugness to insure an excellent electric contact, aswell as perfect mesh of the gearing, without giving the shunt-operatingmechanism any tendency to bind, the shaft c and bolt 12 being as loosewithin the tube as de sired. This is an important feature of myinvention.

In case it is desired to shunt around ones own bell, for example, whenoperating the coca-42o generator, I provide an additihial contact memberR, carried by the block '1, having a connecting-ear a" and acontactpoint "r in the path of the member R and adapted to be engagedthereby when the machine is opcra ted, but normally out of contact.

The generator shown is adapted particularly for telephone service, andit may operate to ringones own hell or not, as desired, according towhether the switch member R is out of use or is a terminal of a shuntaround the bell. Thus in the diagram Fig. 7 the circuit is normally asfollows: from the main A through the bell to swii ch It, t hence throughthe tube r and the frame to the main A. hen the generator is operated,the connection from theswitch R to the tube is broken, and the circuitis then (when the bridging wire ais not used) through the bell andthrough the pin r, set in the armatlire-shaft, thence through thearmature-coils, the frame of the machine, and to the main A. When thebridging wire a is used, operation of the generator shifts the switch Rto contact R, and the circuit is closed from A through the branch aaround the bell and through the armature to the main A.

Having described my invention, I claim 1. In a magneto-electricgenerator, in combination, a compound driving-shaft, consisting of atubular member and an inclosed rod between which there is limitedrelative rotative movement, an armature adapted to be driven by onemember of said shaft, and d riving means connected with the otherwhereby the armature may be rotated, a plug within the sleeve, and meanswhereby said relative rotative movement moves said plug, and a switchmember actuated by such movement, substantially as described.

2. In a magneto-clectric generator, in combination, a driving-shaft, aninsulator carried near the end of said shaft, a switch membernormallycontacting the end of said shaft, a crank connected with saiddriving-shaft, means for forcing said insulator against said switchmember to break its contact with said driving-shaft, said means beingoperated by the rotation of the said crank, substantially as described.

3. In a magneto-electric generator, in combination, a driving-shaft, aswitch member Which makes electric contact with said driving-shaft, awheel mounted on said shaft, means for allowing limited relativerotation between said drivingshal't and said wheel, means for holdingsaid driving-shaft in an extreme position, an armature driven by saidWheel, and means whereby a relative rotation of said shaft and wheelbreaks the contact of said switch member with said driving-shaft,substantially as described.

4. In a magneto-electric generator,an armature, a compound driving-shaftconsisting of a rotatable sleeve and an inclosed rod, a crank connectedwith said rod, a gear connection between said slceve and thearmatiire-shaft,

ICC

means for li miting the relative rotative movement between said rod andsleeve,a plug within said sleeve, aswitch member normally engaging theend of said sleeve, and cooperating inner faces carried between saidplug and said rod whereby said relative rotalive movement may force theswitch member-away from the sleeve, substantially as described.

5. In a magneto-electric generator, in com bination, a compounddriving-shaft, consisting of a tubular member and an inclosed rodbetween which there is limited relative rotative movetnent, an armatureadapted to be driven by one member of said shaft, and driving meansconnected with the other whereby the armature may be rotated, a boltwithin the sleeve, and means whereby said relative rot'ative movementmoves said bolt, a spring connecting the two members of the shaft andtending against relative rotative movement,

and a resilient switch member adapted to be moved by said boltbuttending to return said bolt to its normal position, substai'itially asdescribed.

6. In a magneto-electric generator, in combination, a suitably-journaledarmature, a compound d living-shaft consistingof asleeve and a containedrod. a driving member mechanically connected with one part of saidshaft, and a mechanical connection between the other part of the shaftand the armature, means for preventing relative longitudinal movementbetween the rod and sleeve but allowing some rotative movement betweenthem, a bolt within said sleeve, means for preventing relative rotativemovement between the bolt and sleeve but allowing some longitudinalmovement of the bolt, cooperating inclined faces between the bolt androd, and a switch operated by the longitudinal movement of said bolt,substantially as described.

7. In a magneto-electric generator, in combination, a driving-shaft, aswitch member normally contacting said shaft, said drivingshaftcomprising a sleeve, an insulator carried slidably within the endthereof, a slidable bolt therebehind, means for preventingrelativerotation between said bolt and sleeve, an inner shaft, a crank connectedtherewith, means for preventing relative longitudinal movement betweensaid sleeve and inner shaft, said shaft and bolt having cooperatinginclined end faces, whereby a movement of said inner shaft with respectto said sleeve moves said insulator to break the contact between saidswitch and said shaft, substantially as described.

In a magneto-electricgenerator, in combination, a frame, an armaturejournaled therein, a compound driving-shaft journaled in said frame,said shaft consisting of a sleeve and an inner rod, said sleeve being inelectrical contact with the frame, gearing connecting one member of theshaft with the armature, and a driving-crank connected with the othermember, a switch membernormally engaging said sleeve and thereby makinga shunt around the armature, means for limiting relative rotativemovement between the parts of the shaft, while allowing some suchmovement, and means whereby such movement separates the switch memberfrom contact with the end of the sleeve, substantially as described.

9. In a magneto-electric generator, in comhina-tion, a compounddriving'shaft consisting of a sleeve and an inclosed rod, a @0111- pounddrivin mechanism loosely connecting with play said sleeve and rod, saiddriving mechanism consisting of a wheel rigid with one member of theshaft and a retainer-plate rigid with the other member, the members ofsuch mechanism carrying disconnected shoulders standing in the path ofeach other whereby a limited rotative movement is allowed between thetwo, and a switch actuated by said relative rotative movement,substantially as described.

10, In a magneto-electric generator,in combination, a compounddrivingshaft consistsisting of a sleeve and a rod within the same,

a driving mechanism consisting of a wheel mounted on one member of saidshaft and a retainer-plate rigid with the other member, one member-ofsuch mechanism havinga pro jection and the other member having separatedshoulders between which said projection takes and with either of whichit may engage, a spring normally holding said projection against one ofsaid shoulders but allowing it to move until engaging the othershoulder, an armature, and a driving mechanism connected respectivelywith the two members of said shaft, and a switch actuated by therelative rotative movement between said members, substantially asdescribed.

11. In a magneto-electric generator, in combination, a compounddriving-shaft, a switch member which normally contacts with saiddriving-shaft, a driving mechanism consisting of a wheel mounted on onemember of said driving-shaft and a retainer-plate rigid with the othermemberof said shaft, one member of such mechanism having projectionstaking into holes .in the other member, a spring normally holding saidmembers so that said projections contact the edges of said holes, anarmature driven by said wheel, and means whereby the relative rotationbetween said wheel and driving-shaft breaks the contact of said switchmember with said drivingshaft, substantially as described.

12. In a magneto-electric generator, in combination, an innerdriving-shaft, a sleeve carried thereabout, a resilient switch membernormally in contact therewith, a gear mounted on said shaft, and havingholes in the body thereof, a retainer-plate rigidly carried by saidinner driving-shaft, and having its edge flanged toward the disk of saidgear, tongues integral therewith projecting into said holes, a springcarried within said retainer and connecting it to said gear, a slidablebolt within said sleeve, there being cooperating inclined faces betweensaid bolt and inner shaft whereby relative movement between them mayforce the switch member away from said sleeve, and an armature connectedwith said gear, substantially as described.

13. In a magneto-electric generator, in combination, a driving-shaft, aresilient switch member normally contacting said drivingshaft, anindependent switch member lying in proximity to said resilient member,an insulator carried by said driving-shaft, means for moving saidinsulator so as to move said resilient member out of contact with saiddriving-shaft and into contact with said independent switch member,substantially as described.

14. In a magneto-electric generator, the combination of a compounddriving-shat't, consisting of a sleeve and an inclosed rod between whichthere is relative rotative movement, an armature and a driving membermechanically connected respectively with the two parts of saiddriving-shaft, a switch member normally contacting said driving-shaft,an independent switch member lying in the path of the switch memberfirst mentioned and normally disconnected therefrom, and means wherebythe relative rotative movement between the parts of the shaft moves theswitch member which normally contacts the sleeve out of engagementtherewith and into engagement with the other switch member,substantially as described.

15. In a magneto-electric generator, in combination, a driving-shaftcomprising a sleeve and an inner shaft, an insulator carried within theend of said sleeve, an insulating-block fastened to the frame of saidgenerator, a resilient switch member carried by said block and havingpermanentcontact with the armature of said generator, and normallycontacting the said sleeve, a second switch member also mounted on saidblock and lying behind said resilientswitch member, said switch membershaving means for connecting wiring thereto and means whereby the turningof said inner shaft moves said insulator, to move the switch memberwhich normally contacts the sleeve out of engagement therewith and intoengagement with the other switch member, substantially as described.

In testimony whereof I hereunto affix my signature in the presence oftwo Witnesses.

CHARLES H. NORTH. Witnesses:

F. D. AMMEN, ALBERT H. BATES.

